Part of the answer is that while I'm trying to think up an adventure I sit and draw. So while, yeah, I maybe didn't need to have every single hair on the giant baboon's body picked out like that just to remember there was a giant baboon when I use that page to run a game, I did have to spend some time figuring out who the baboon was, why he was there, etc and all that came up while drawing him.
The other part of the answer is basically because of what happened the first time I did a published RPG book, Vornheim:
In 2011 or whatever, I got it in the mail and then I felt so relaxed any time I was running a game and the party wandered into Vornheim, because, hey, it was all there. Y'know, organized. Map, monsters, notes, sorted: cool.
I mean I don't remember half of this stuff any more than anyone else does, having it in my face and having each spread look different genuinely saved me time in the long run. So I thought: Ok, why not do all these notes like that? Make everything like that or like the One Page Dungeon Contest.
And it worked, this week's game I had to level someone up (so I pulled out the player's handbook) and the players bought some books (so I pulled out the treasure table) but otherwise I ran the whole game off information in about 4 square inches of notebook.
So, yeah, now that the notebooks are being published: I wasted time so you don't have to.
Two new Cube Worlds are out, 5 bucks each, they're both batches of semi-self-contained scenarios set all over the world, and again most of them were going to be in Lamentations of the Flame Princess' cancelled Violence in the Nympharium.
Cube World 16 is The Sorcerer, The Disintegrator, and The Giant Baboon (thus the baboon) and Cube World 17 is A Legion, A Dimension, A Cave, A Tower (the hydra is guarding the tower, which only exists at night).
You can check them out here.